| // Copyright 2013 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| |
| #[repr(u8)] |
| enum Eu8 { |
| Au8 = 23, |
| Bu8 = 223, |
| Cu8 = -23, //~ ERROR unary negation of unsigned integer |
| } |
| |
| #[repr(u16)] |
| enum Eu16 { |
| Au16 = 23, |
| Bu16 = 55555, |
| Cu16 = -22333, //~ ERROR unary negation of unsigned integer |
| } |
| |
| #[repr(u32)] |
| enum Eu32 { |
| Au32 = 23, |
| Bu32 = 3_000_000_000, |
| Cu32 = -2_000_000_000, //~ ERROR unary negation of unsigned integer |
| } |
| |
| #[repr(u64)] |
| enum Eu64 { |
| Au32 = 23, |
| Bu32 = 3_000_000_000, |
| Cu32 = -2_000_000_000, //~ ERROR unary negation of unsigned integer |
| } |
| |
| // u64 currently allows negative numbers, and i64 allows numbers greater than `1<<63`. This is a |
| // little counterintuitive, but since the discriminant can store all the bits, and extracting it |
| // with a cast requires specifying the signedness, there is no loss of information in those cases. |
| // This also applies to isize and usize on 64-bit targets. |
| |
| pub fn main() { } |